Some users prefer to obtain RTCM via WiFi and then use BT for their data collection (ie, SW Maps, etc). Some users prefer to put a unit into Base mode, push RTCM over WiFi and then use BT to monitor the status of their base.
My main concern was getting ESP-Now and Bluetooth (albeit BLE) working simultaneously. This allows a point to point base-rover connection without the need for external radios: https://docs.sparkfun.com/SparkFun_RTK_ … nu_radios/